A metal sulphide (A) gives (B) gas with rotten egg and (C) a colourless sulphates, when treated with dil. H_(2)SO_(4) (B) reacts with K_(2)Cr_(2)O_(7)//H^(+) to form (D) a white grey element. (D) burns in oxygen to yield (E) a colourless gas. If (B) is added in (E), it gives (D) and colourless liquid, which turns anhydrous CuSO_(4) blue. (C) gives a precipitate with NH_(3(aq)) or NaOH which dissolves in excess of NaOH. B is

A metal sulphide (A) gives (B) gas with rotten egg and (C) a colourles

1.	A metal sulphide (A) gives (B) gas with rotten egg and (C) a colourless sulphates, when treated with dil. H_(2)SO_(4) (B) reacts with K_(2)Cr_(2)O_(7)//H^(+) to form (D) a white grey element. (D) burns in oxygen to yield (E) a colourless gas. If (B) is added in (E), it gives (D) and colourless liquid, which turns anhydrous CuSO_(4) blue. (C) gives a precipitate with NH_(3(aq)) or NaOH which dissolves in excess of NaOH. B is
Answer» `SO_(2)` `SO_(3)` `H_(2)S` `CS_(2)` Solution :Due to formation of `H_(2)S` gas